Plot registration & free hold charges by Kanpur Development Authority

I have alloted a plot of 150 sqm in highway city scheme of kda in 2008 @ rs.4000/Sqm in lottery. I paid the balance amount on 2008 (within 1 month of allotment). After that I DID not get any acknowledgement for receipt of full payment by kda nor any information to get the plot registered. I visited there many times but always informed that the registry is not being done at present due to no orders from government. Now on 2011 I again visited for getting the plot registered. Now I am being informed that the circle rates are increased from rs.4000/Sqm to rs.8000/Sqm & you have to pay free hold & registry charges accordingly. This will lead me for an extra payment of around rs.90000. My concern is that why should I get the plot registered at present rate when I purchased the same at rs.4000/Sqm & paid full amount within the kda deadlines. Kindly help me so that I can get my plot registered at the purchased rates.